The Cévennes are a range of mountains in south-central France, covering parts of the départements of Ardèche, Gard, Hérault and Lozère.The word Cévennes comes from the Gaulish Cebenna, which was Latinized by Julius Caesar to Cevenna. The Cévennes are named Cemmenon (Κέμμενων) in Strabo's Geographica.In French, the adjective derived from "Cévennes" is Cévenol (fem. Cévenole), as in d'Indy's Symphonie Cévenole, a composer of Ardèche origin (known in English as his "Symphony on a French Mountain Air"). The mountain range also gives its name to a meteorological effect when cold air from the Atlantic coast meets warm air of southern winds from the Mediterranean and causes heavy autumnal downpours, often leading to floods. These are called épisodes cévenols.